On 09/25/2017 02:38 AM, jim bell wrote:
On Sunday, September 24, 2017, 3:25:10 PM PDT, \0xDynamite <dreamingforward@gmail.com> wrote:
On 8/4/17, jim bell <jdb10987@yahoo.com <mailto:jdb10987@yahoo.com>> wrote:
"Vernam cipher"
YES! That is the cipher. I can't believe I forgot the name of it. Geez, I'm just re-realizing all of my undergrad training.
AFAICT, it is UNBREAKABLE if the keysize is at least half the size of your plaintext. Marxos
My understanding is that the keysize ought to be as long as the message to be encrypted.
And yes, it is unbreakable... UNLESS you try to reuse the keys!!! Google-search the word "Venona" to learn more.
Jim Bell
Very very easy to implement too, though getting quality key material is a bit of a hassle. I have considered filming rough water then taking the low bits and repacking them. I wonder if low bits from the sounds in a chicken coop would work too. --- Marin